Integrative Information System Design for Florida Department of Transportation: A Framework for Structural Health Monitoring of Movable Bridges

Bridges constitute critical nodes of transportation systems, and therefore, ensuring their continuous operation is of the utmost importance for safe and efficient transportation. Currently, visual inspections and simplified analysis techniques are employed for condition assessment and for decision making about bridges. A novel approach to bridge condition assessment is Structural Health Monitoring (SHM), defined as the measurement of operating and loading environment through use of a system to track and evaluate incidents, anomalies, damage and deterioration. The objective of this project was to develop an SHM framework for integrative information system design. This framework is expected to improve bridge safety, enhance efficient operation and enable effective and low cost maintenance by taking advantage of new technological advances. Movable bridges are considered as the focus bridge type because these bridges exhibit various structural, maintenance and operational problems. In this study, inspection and maintenance records of the movable bridges are analyzed to determine the current condition of these bridges as given in these records. Then, numerical and experimental studies are developed and conducted. Data processing and some novel analysis methods that are being employed by the authors are summarized along with examples from laboratory studies. These analysis methods include statistical pattern recognition methods, parameter estimation with sensor fusion and model updating, estimation of reliability and prediction of future performance using Bayesian updating with monitor data, and possible use of computer vision. These algorithms have to be coupled with data monitoring front panels which can be used by engineers and other users. In this study, a data monitoring front panel, which makes it possible to monitor multiple sensors is also developed and presented. Concepts for data management and use of information technologies for efficient and effective use of SHM data are discussed. Also, critical components and locations of movable bridges are summarized for monitoring purposes. In addition to structural components, Hopkins frame, trunnions, live load shoes, shafts, span locks electrical motors, gear boxes and open gears are determined to be candidates for monitoring. An application such as described in this report can be expected to mitigate the problems, improve future designs and reduce the maintenance costs. Further studies and field demonstrations are necessary to evaluate the real life performance of the technologies and methods, as well as to quantify the cost-benefit ratio of integrated SHM applications.

Language

  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 231p

Subject/Index Terms

Filing Info

  • Accession Number: 01054643
  • Record Type: Publication
  • Contract Numbers: BD548/RPWO 11
  • Files: TRIS, STATEDOT
  • Created Date: Jul 25 2007 3:02PM